Multitech MT1932ZDXK User Manual download pdf (Page 8)

DS 2.501A 8 - 16 03/03

MIU COMMISSIONING (RS 232 TO RS 485 CONVERTER MODE)

1. Disconnect power supply.

2. Remove the gland plate and using a 25 way null modem cable

connect the MIU to the computer. Note the computer connector

may be a 9 way D type connector, either use a 9 to 25 way adapter

or a 9 to 25 way ribbon cable.

3. Select the mode of operation from bit switches 7 and 8.

Bit switch 7 ON (transparent operation).

Bit switch 8 ON (RS 232 operation).

4. Select the communication speed for both the PC and LAN by using

the jumpers (LK 6 and LK 5 respectively). The communication

speeds are marked on the PCB. It is possible to set the LAN

communication speed from a computer running Satchnet

Networking Software version 6.3 or later, if this is required jumper

LK 5 should be removed.

5. The RUN, MODEM and DUMB LED's should light simultaneously.

The MODEM LED will then go OFF.

6. If the start up sequence does not follow the description in

instruction 5 then turn the power off and check that the MIU and

controllers have been correctly wired and that there are no short

circuits in the communication wiring. Switch on the power and

check the MIU start up sequence again. If no obvious fault is found

and the MIU still fails to start correctly then the MIU should be

replaced.

7. The MIU is now fully operational.

MIU 3252 AS AN RS232 TO RS485 CONVERTER - SPEC 585-3-252

To further

controllers on the

LAN e.g. IAC400

600, CSMC, MMC

etc.

Standard

Null

Modem

Cable

RS232

Port

inside

MIU

LAN Port

Fig.9

WESTERMO MA-42 RS232 TO RS485 CONVERTER

Westermo Hardware Settings. See the

following text.

1. There are two types of MA-42 only

distinguishable by the fact that one

version uses surface mounted ICs.

To further controllers on the

LAN e.g. IAC400/600,

CSMC, MMC etc.

* Do not use Westermo User

Manual terminal numbers.

Line Connection

Fig.10

V24/RS232-C

Connection

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

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Multitech MT1932ZDXK User Manual Page 8

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